I'm super cheap, I have Dr Diff hangers with the perches moved in 1"
I just bolted up the factory e-body sway bar. It's not perfect, but it works.
Later on I might buy another bar, Firm Feel apparently will make you an e-body bar with the b-body width.
I did the calculations and the slightly wider bar only reduces the downward force by ~5%, so no biggie in my book.